The Prayer, hailed as one of the most popular contemporary classical pop duet of the 21st century was written by David Foster, Carole Bayer Sager, Alberto Testa and Tony Renis. Originally written in F major (high Bb for male vocals), a soprano and tenor is recommended due to the high notes involved, especially for the male.
An excellent mix of both the usage of english and italian (foreign language) as well as simple, beautiful accompaniment (only a piano or keyboard is required for it to work) makes it a common song to be sung in weddings, performances and even recitals.
Here, a young talented duo Jonathan and Charlotte performs The Prayer as their final performance in Britain's Got Talent and it's amazing how young they are, putting even people like me to shame. I simply like how Jonathan ends it off with the high B! Fast forward to 1:26 for the start of the song. If this young duo doesn't satisfy your cravings, you can check out Andrea Bocelli and Celine Dion as well.